iteragain/dist/esm/internal/SliceIterator.js

Javascript Iterable/Iterator/Generator-function utilities.

/** An iterator that only yields values beginning from `start` (inclusive) and ending at `end` (exclusive). */
export class SliceIterator {
    constructor(iterator, start, end = Infinity) {
        this.iterator = iterator;
        this.start = start;
        this.end = end;
        this.i = 0;
    }
    [Symbol.iterator]() {
        return this;
    }
    next(...args) {
        let result;
        while (!(result = this.iterator.next(...args)).done && this.i++ < this.start)
            ;
        if (this.i <= this.end)
            return result;
        return { done: true, value: undefined };
    }
}
export default SliceIterator;
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